Joe Nathan turns 39 this week, but may be the most coveted reliever on the free agent market.AP Photo

Joe Nathan has watched the Detroit Tigers from afar, as they've won the last three American League Central titles and plan on contending again in 2014.

The free agent closer also is getting a little nudge from a former teammate, too.

Nathan told MLB Network Radio that he's exchanged text messages with current Tigers outfielder Torii Hunter on the possibilities of signing with Detroit.

"That's a very appealing and attractive team to look at," Nathan said on "Inside Pitch." "I definitely love the Tigers. Know them very well, having competed against that squad for so many years when I was with the Twins."

Hunter and Nathan were teammates in Minnesota for four seasons.

In his 13-year major league career, Nathan has 341 saves and a career 2.76 ERA. He'll turn 39 years old Friday, but is reportedly seeking a two-year deal that could pay him at least $10 million per season.

Last season, as the Texas Rangers' closer, he was 6-2 with a 1.39 ERA and converted 43 of 46 save opportunities.

"A good ballpark to play in, a good crowd to play in front of," Nathan continued on Detroit. "Their lineup and offense is obviously impressive. Their defense definitely has improved."

The Tigers' biggest competition for Nathan could come from the New York Yankees, who need to replace Mariano Rivera.

In addition to Nathan, Detroit reportedly has interest in Brian Wilson, the former San Francisco Giants closer who served as an effective setup man for the Los Angeles Dodgers last season.

Joaquin Benoit had 24 saves for the Tigers in 2013. He's also a free agent.